Contrast Checker
Check text contrast against WCAG guidelines.
Processed on your device. Inputs are not uploaded.Your result
Enter your values to get started.
How to use
Enter foreground and background hex colors to calculate their WCAG contrast ratio.
Example
Black on white has a 21:1 contrast ratio.
Limitations
Opaque sRGB colors only. This checks text color contrast, not the accessibility of an entire design.
Privacy
Your input stays in browser memory while you use this page. It is not uploaded or saved. Downloads are saved only when you choose to save them.